I know I made plenty of mistakes in my tenure. But one of the things that you learn is to be very careful and to protect yourself down the road a little bit, which is to say you've got to think ahead and think where is the story going to go? What are all the possible outcomes? And how do I protect the president from unexpected twists and turns in the road?

Palin was a political Hail Mary, a long bomb in the closing minutes of a game that John McCain and Co. were certain to lose. They didn't care if she had the policy or political or emotional capacity to serve as vice president, let alone president. They were willing to drive the country off a cliff, if that's what it took to win.

Women have a lot of power in private life. There are many men who would say, 'Hey, women already rule my life.' But with women, more is more. The more there are, the more the world gets used to seeing them. We change the culture. We begin to expand options and lead and manage.

Part of Obama's persona is self-reliance. He's calm; he's cool; he's self-possessed. In many ways, he has tried to define himself in opposition to Clinton's sometimes needy, often undisciplined, emotionalism.

Obama seemed poised to realign American politics after his stunning 2008 victory. But the economy remains worse than even the administration's worst-case scenarios, and the long legislative battles over health care reform, financial services reform and the national debt and deficit have taken their toll. Obama no longer looks invincible.

When I first started working in politics, as a junior aide on Walter Mondale's 1984 presidential campaign, it never occurred to me that I would one day work in the White House. There were plenty of women among the volunteers who stuffed envelopes and walked precincts. But there were fewer and fewer on each successive level of influence and access.

While eschewing emotion - and its companion, vulnerability - Obama should be careful not to sacrifice empathy, the 'I feel your pain' connection that sustained Clinton. This connection is the shorthand people use to measure their leaders' intentions. If people believe you're on their side, they will trust your decisions.